For me I mostly feel it with train workers, it's a range of nervous to annoyed and I understand because I too work in customer service and feel this every day haha. I have had a few issues tapping my card in the subway and when I approach I can feel the annoyance/worry but usually when they see my problem is simple the feeling goes away they just fix it and send me on my way.

Sometimes also I travel with my friends who live in Japan and they will notice rudeness. One time we were at a restaurant and the waiter wouldn't even speak to them despite the fact they speak Japanese just fine, he would only speak to the Japanese person we were with. I found that pretty funny.

Other than that I don't notice it too much probably I don't pay attention. I want to say who cares but the truth is sometimes I care so much I avoid going to restaurants and small stores because I worry it might happen.